Friday, 21 November 2014

The sun and the temperature

The sun causes all our weather because it heats the earth unevenly. The contrast between the hot parts and the cold parts of the earth turns our atmosphere into a powerful engine. The engine keeps cold and warm air moving and makes changes in air pressure. Those air pressure changes cause wind. The heat of the sun also helps moisture to rise and form clouds, bringing rain, snow, or thunderstorms. So all the changes in our weather come, at least indirectly from the sun. For more on the summer sun, go here.

Blanket of Air
As the sun warms up the earth, the ground absorbs the heat, and reflects some of it back into the air. That's one reason why it's usually warmer near the ground and cooler on the higher hills and mountains. The atmosphere acts like a big blanket over the earth, holding in the warmth and reflecting it back to earth


Explain the text with your words. No use the translator, you can search for the meaning of what you do not know, but explain it, with your words.

  • Why is so important the sun?

  • how the sun created the climate zones?

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Friday, 7 November 2014

What is Drought?

What do you think when you hear the word drought? Do you think “dry,” “hot,” “dusty,” or “cracked earth,” or even “no water”? If so, you’re on the right track!
When a place is in a drought, it is dry and hot, often dusty; cracks may appear in the soil, and rivers, lakes, streams, and other sources of water can go dry. A drought means that a place has less precipitation (rain or snow) than normal over a few months or even longer.
What causes this? How does drought really affect us? How can we be prepared for drought? These are all important questions that we will answer as we explore drought.

What causes a drought? 
How Does Drought Affect Our Lives?

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